Operating mechanism for injectors



Jan. 6, 1931. D. s. BEATTIE OPERATING MECHANISM FOR INJECTORS Filed June 18, 1929 2 Sheets-Sheet 1 A TTORNEY.

Jan. 6, 1931. D. s. BEATTEIE 1,787,432

OPERATING MECHANISM FOR 'INJECTORS Filed June 18. 1929 J 2 Sheets-Sheet 2 Dan/H 5 Emili IN VEN TOR.

ATTORNEY Patented Jan. 6, 1981 FFICE DANIEL BEATTIE, F ATLANTA, GEORGIA, ASSIGNOR T0 NATHAN MANUFACTURING COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK OPERATING MECHANISM FOR INJECTORS Application filed June 18, 1929. Serial No. 371,950.

This invention relates to mechanism: for operatlng'in ectors, that is apparatus for feeding water into boilers under pressure,

and is particularly adapted for use with injectors of the non-lifting type as applied to locomotives. Injectors of this type are usual- 1y operated in the following manner wellknown in the art. 7

Water is allowed to run into the injector 1 body by opening a valve attached to the injector until it issues at the overflow. Steam is then admitted through an independent valve to the nozzles within the body of the injector where the velocity of the steam is imparted to the mass of the water so that the momentum of the two which is greater than the pressure within the boiler, permits the water to be forced into it. It is thus apparent that to operate the injector two distinct motions are necessary. First, that of opening the water valve; second, that of opening the steam valve.

It is the principal object of this invention to combine the two aforesaid operations into one by the employment of suitable devices which use a fluid medium, such as steam, to start and stop the operation of the injector.

Another object is to eliminate entirely the opening and closing of the water valve but to adjust it to the required degree and keep it in that position, and prevent spilling of water at the overfiowwhen the injector is inoperative by shutting offthe overflow simultaneously with the steam valve. Other objects I will become apparent as the nature of the invention is better understood after a perusal of the following specification and an inspec-' tionof the accompanying drawings in which Fig. 1 shows a diagrammatic, fragmentary,

attached an injector of the non-lifting type in connection with a standard three-way operating valve especially adapted to beeused with these improvements; 7 n

Fig. 2 is an enlarged elevational view, partly in section, of an injector in an open or feed ing position embodying a preferred form of my improvements; Y V Fig. 3 is a similar View showing the injector in a closed position or at rest;

elevational View of a locomotive to which is 4 is a plan view of the injector turned at an angle of 90 degrees; and i Fig. 5 is a fragmentary sectional view of the steam valve operating mechanism in a modified form.

Like numbers of reference denote similar parts throughout the several views and the following specification.

10 is a fragmentary part of a locomotive to one side of which is attached an injector 11 of the non-lifting type, having a steam connection 12, a water connection 13, a delivery connection 14, and an overflow connection 15. The steam connection 12 is attached to an elbow 16 at the top of the injector 11 forming, preferably, an integral part therewith. A steam pipe 17 leads from the steam connection 12 to a main shut-off valve 18 at a turret 19 on top of the boiler within the cab.

.20 is a steam nozzle screwed into a wall 21 separating a steam chamber 22, in communication with steam pipe 17 by connection 12,

and a water chamber 23 which communicates with a water pipe 24: from the tender (not shown) coupled to the injector. by means of connection 13. 25 is a water valve controlling a port 26 through which water is admitted into the chamber 23. lVater valve 25 is operated by means of a valve handle 27 located in a convenient position within the cab and fastened to a rod 28 which is connected to the valve by means of a universal joint 29 as clearly shown in Fig. 1.

Screwed into the top of injector 11, adjacent to elbow 16 and in alignment with steam nozzle 20 is a housing 30, closed at its outside by a cap 31. This housing is bored out int-eriorly at 32 and concentrically therewith to a somewhat smaller diameter at 33 to receive a differential piston head 34 composed of a large piston 35 and a small piston 36, slidingly engaging, respectively, inner bores 32 and 33 of the housing. The lower end of the piston head 34 is reduced to a spindle 37 to which is suitably fastened a valve disc 38 adapted to seat on the inlet end of thesteam nozzle 20. The top of the piston head 34 is provided with small lugs 39 adapted to contact with the bottom of cap 31 for the purpose of keeping the main portion of the top of the pistonhead in spaced relation with the cap. The head 34 is hollowed out at its top forming with the bottom of cap 31 a pressure chamber 40. 41 is a vent through theside of the housing 30.

. 42isjan overflow casing atthe side of the injector, l'lhaving within it an opening 43 communicating with'the water and mixing chambers around the nozzles of the injector 1 sothat through thisopening-water or. amine ture of water and ste'am may treelyipassinto .i

passages 44 and thence by way of an overflow pipe 45, coupled on to the injector by con nection 15, into the atmosphere or ash-pitor other desirable point of discharge. ing 43 is controlledby .a vertically operating check 46 which has 'a substantially fiatjdisc-46 -closing the opening, and a fiutedpguide 47 above its 481s a housing screwed into, the ,7

top of the overflow casing 42 and bored out I interiorly for a. piston 49 adapted to reciprocate within it. The lower end of piston .49

is tubularly shaped at 50 and telescopes over 7 the ,fiuted guide 47 of check 46. The top of andjprovided witha relatively smallbore 57 v,onthat branch whichscrews into ihe cap, .One side branch of the cross 56 has connected, toit 1the aforesaidsmall pipe 58, extending ,The other side branch of the cross has. screwed .ontositia heater valve 68 preter'ablyof; standpist0 n'49 isslightly cupped to form with the wardly against the top of the housing.

54 is a pipefitti-ng screwed into the top of housing 48 having suitablyconnectedto it a small pipe 55. 56 is a cross. fitting screwed into cap 31 of housing interiorly bored out upwardly into thecab of the locomotive.

and angle valve, needle type, construction.

, .Thisheater valvehas a pipe 69 connecting it .to :a coupling stud 70 'screwedinto the injj ector body below its valve controlled water port 26, thus establishing communication be- .tweenthe steanrpipe 58 andth water end 0f theinjector. V

Mounted in the cabpconvenientto the: en

ginedr-iver, is a three way cook- 59, of the V usual construction well-known in. the art,

7 7 having an inlet 60 connected .to a' dry steam pp y y- P i in a pressurechamber a stem 370: being lets 62 to pipe .58 and itsotheroutlet 63 to a 5 pipe 64 open to the atmosphere, ,A. lever 65 .plained more fully hereinafter.

The operation of the'deVice s as follows: The 1n ector is shown at rest in Fig. .3. In

; this position the water valve 25 is' open and a .the injector body filled ,withjwater. V The three-way cock59, in the position illustrated in Fig. l, admits steam from pipe 61' to pipe Open- 4 58 by way of cross fitting 56 and forces the piston head 34 downwardly until the valve disc 38-seats uponthe steam nozzle 20, thus cutting oil" the steamsupply to'the nozzles. The area'of the piston 35 of the head 34 being larger than-thearea of .theismaller or lower piston 36, keepsthefvalve disc 38 closed against the pressure below it. Simultaneously steam passesthrough small pipe and fitting 5.4 into pressure chamberT51' and forces the piston 49 downwardly, compressing spring 52 until the lower end of extension 50 of-the piston seats on check 46 and thus closes the overflow opening 43. It is obvious that in this position by virtue of the closing of opening 43- no water can bespilled at. the overflow.

i in order to place the injector ina feeding position, the handle is turned about 9O degrees, when the steam supply. from .pipe 61 is cut ofi the. cock 59;.and when simultaneously steam from. the pipe 58 is exhausted through the .cock" to the atmosphere. The

steam pressure within pipe 17 and. steam chamber22 then. forcesthe disc 38 from its seat andacting against the under side of piston .36 raises the piston, the pressure chamber .40.being open to the atmosphere. The small bore 57 in the cross fitting retards the-motion of the piston head 54 so that steam is admittedinto the noz'zlesgradually in accordancewithbestengineering practice. At the same time steam isexhausted from pressure. chamber 51 through pipe 55 which communicates withpipe58 permitting springc52 to. force thepiston-49 upwar ly so that check 46 isfree to open. While starting the injector and until the jet is establishedwhich forces the water into theaboiler against the :full boiler pressure, it is necessary. to provide anoutlet for the water at the overflow after the jet is'established, check46- closes auto matically and prevents the drawingin of air through opening 43. In Fig. [2 is clearly shown the position of the operating. mecha- .-n1 sm ofthe injector whilefeeding. i

I In connection withthe modified form of steam-valve operating mechanism'shown in 5,a four-way cock is employed instead 7 otthe three-way cock above described. This four-waycock is also of a construction wellknown in the art. With this modification, in order to start the injector,steam is admitted from the operating cock by way of, a pipe 66 below thelpist'on 36a which reciprocates withfluid-tightly and slidably mounted within a is used to operate .the cock as' will be cit-5 ratbiottjom 9 h f s t a ber. S1II1Llll3tI1 Ol1Sly,-'&S explained before in connection with the v three-way cock, pipes 58 and 55 exhaust to the atmosphere'through the operating Cock. In orderto stop the injector,

ating cock. This closes the steam valve 38 and simultaneously the overflow check 46.

The water valve 25 open at all times as stated before. Spilling of the water at the overflow when not feeding is prevented by the closing of the checked it obvious therefore, that where the engine driver formerly had to ope ate two valves, viz, a valve admitting steam to the nozzles and the water valve fromclosed to open positions, it is with these improvements only necessary to operate one valve, namely the three-way cook 59 which controls the steam supply to the nozzles and simultaneously opens or closes the overflow. The water valve 25, while shown with an operating handle extended into the cab,

can be left in a, position adjusted to suit requirements and need not be disturbed thereafter, except should it be desired to examine or repair the overflow piston mechanism in which case it should be closed to stop the waste of water at the overflow. For all practical purposes, therefore, it so desired, the

operating handle and rod for the water valve 25 may be entirely omitted and the valve set by other suitable means right at the injector body, thus relieving con 'estion in the cab.

A valve 18 is applied in the steam line to the injector only to act as a main shut-oil in case of repairs. No operating valve intermediate the main valve and the injector is needed, the operating cook 59 being used instead.

In order to heat the water in the tender of the locomotive, heater valve 68 is opened and steam admitted through pipe 58 and by way of the water connection of the injector to the tender. V' ith the arrangement shown in Fig. well the modification illustrated in Fig. 5, the steam supply to the heater valve 68 is automatically cutoil as soon as pipe 58 in both figures exhausted to the atmosphere through the operating coclr. In this manner manual openin or closing of the heater valve when starting the injector is entirely eliminated and in cold weather, due to the needle type construction of this valve,

- a sinall'amount of will always be adgradually adr mitted into the tender while the injector is inoperative.

One of the principal advantages of the in venti-onresides in the fact that because the steam pipe right up to the injector steam nozzle is filled with steam or water of condensation under pressure, water hammer due to the sudden admission of steam from the steam inlet valve heretofore in'use is entirely eliminated. lVith these improvements steamis ted directly into the nozzles and does not strike an inert body of water with full force. 7

Because the opening of the steam and overflow valves. by means of the arrangement described herein is practically simultaneous the usual waste of water at the overflow which occurs when two independent valves are operated is cut down to the lowest possible minimum.

It is understood that various other changes oi form, proportions and minor details of construction may be resorted to without de parting from the principles or sacrificing any of the advantages or the invention as defined 1 the appended claims.

lVhat I claim as new, is: I

1. Means to operate a non-lifting, injector, comprising an independent valve adapted to comrol the admission of steam to the injector nozzles by fluid pressure, a water valve in lined adjustment, and an ovcrliow check, the said independent valve havin means to hold the said check in closed position when no steam is admitted the injector nozzles, and means to relieve the fluid pressure from above the said check to permit the check to open simultaneously with admission of steam to the said nozzles.

2. In a non-lifting injector, an overflow check, a piston adapted to close the said check, an independent operatingvalve having means controllf' the admission of steam to the injector nozzles, means to close by fluid pressure the said check, and means to force the said piston from closing contact with the said checlr as soon as the fluid pressure is removed therefrom simultaneously with the admission oi steam to the nozzles.

3. in a non-lifting injector having a steam valve controlling the admission of main stcz in to the injector nozzles, a water valve, an overflow check adapted to be opened to permit the overflow oi? water from the injector when starting, a piston connected to the said steam valve, and a piston operably connected to the said 0 ertiow check, an operatingvalve adapted to admit steam simultaneously to one side of each of the said pistons for the purpose of, respectively, closing the said steam valve and holding the said overflow check in a closed position.

l. in a non-lifting injector, a steam valve, an overflow check adapted to reciprocate freely when the lDjQCJOl is in operation, and common means adapted to close the said steam valve and simultaneously the said ion lil

within the chamber, a steam valve connected to the'said piston, another pressure chamber, 'a'piston' adapted to be reciprocated wlthin the said other chamber, an overflow check 9 adapted to contact with thepiston in the said other chamber, and common means to admit fluid pressure to bothsaid pressure chambers on top or both the said pistons for the purpose of closing the said steam valve and the said overflow check, thesa-id steam valve being opened by thefluid pressure below the piston connected to it automatically and the said overflow check being free to reciprocate as soon as the fluid press'ure'is removed from their respective pressure chambers.

7 In a non-lifting injector, a pressure 1 chamber, a piston adapted to be reciprocated within the chamber, a steam valve connected 7 to the said piston, another pressure chamher, a piston adapted to be reciprocated witho in the said other chamber, an overflow check adapted to contact with the piston in the said other chamber, and common means to admit v fluid pressure to both said pressure chambers for the purpose of closing the said steam valve and the said'overflow check, the said steam valve opening automatically and the said overflow check being, free to reciprocate assoon as the fluid pressure is removed from their'respective pressure chambers, and a 'springa'dapted to force the said other piston away from the said check when the fluid pressure is removed from the said other chamber, topermit the check to be opened freely.

8. In a non-lifting injector, a steam valve, an overflow check adapted to reciprocate freely when 'the injector is in operation, a heater valve controlling the supply of steam to the Water connection of the injector to heat the water in the tender, normally open when the 1n ector 1S inoperative, and common means adapted to close the said steam valve and simultaneously the said overflow checkby fluid pressure and simultaneously admit steam to the said heater valve.

9. Ina non-lifting injector, a pressure chamber, a piston, means to admit fluid pressure to the chamber at one side of the piston and means to exhaustthe chamber at the other side of the said piston for the purpose of reciprocating the piston, a steam valve adapted to be closedby the said piston, another pressure chamber, a piston within the said other chamber, an overflow checln'means to admit fluid pressure to one sideof the piston in" the said other chamber to force the piston v to keep the said overflow check closed while I the-saidjsteam' valveisclosed, and meansto open the said overflow check automatically;

' as soon as the said steam valveis opened.

In testimony whereof I have hereunto set my hand. v V I DANIELS. BISLAIYIIE. 

